... sheet with the b12 of the other monomer, and towards the C-terminus, the subsequent residues, Phe182–Lys186, pass through the a2 vicinity of the other monomer. For the FeR dimer, the N-terminal ... of the structure of NADP+-bound FeRrevealed that the nicotinamide moiety of NADP+faces the re-side of the isoalloxazine ring, and that the 2¢-P-AMP moiety is held in the groove between the ... fulgidusFeR is one of the candidates for the ferric ion -binding residue based on the structure of the mercury-boundderivative, although a ferric ion was not found at the site of either the native or...